From: David Nebenzahl on
On 10/30/2009 8:17 AM Thor Lancelot Simon spake thus:

> I wonder whether, at this late date, it would be possible to persuade
> Kodak to divulge the formula for Technidol.

Sorry, wrong newsgroup; that should be Richard *K*. (M is a guru from
another NG.)


--
Who needs a junta or a dictatorship when you have a Congress
blowing Wall Street, using the media as a condom?

- harvested from Usenet
From: Nicholas O. Lindan on
"Thor Lancelot Simon" <tls(a)panix.com> wrote

> I wonder whether, at this late date, it would be possible to persuade
> Kodak to divulge the formula for Technidol.

That would be lovely.

Whatever it is, it isn't POTA, more like H&W Control. The ingredients:

1) Diethylene Glycol:
diluent

2) Hydroquinone:
developing agent

3) Diethanolamine sulfur dioxide complex:
alkali/activator?
Carbonate substitute? Kodak loves the stuff.

4) Tris (1-methylethyl) naphthalene sulfonic acid sodium salt:
wetting agent/developing agent(?)

5) 1-Phenyl-4, 4-dimethyl-3-pyrazolidinone:
AKA Dimezone, phenidone-like developing agent

I am taking a guess at the reasons for the DEA-SO2 and naptha-sulfonic salt.
Anyone with any more clues?
--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/da-main.htm
n o lindan at ix dot netcom dot com


From: Thor Lancelot Simon on
In article <NtSdnY-4D6r6sXbXnZ2dnUVZ_sadnZ2d(a)earthlink.com>,
Nicholas O. Lindan <see(a)sig.com> wrote:
>
>3) Diethanolamine sulfur dioxide complex:
> alkali/activator?
> Carbonate substitute? Kodak loves the stuff.
>
>4) Tris (1-methylethyl) naphthalene sulfonic acid sodium salt:
> wetting agent/developing agent(?)

I wonder if this last one is even available any more. Eastman Chemical
used to make a lot of stuff strictly for in-house use...

Thor
--
Thor Lancelot Simon tls(a)rek.tjls.com
"Even experienced UNIX users occasionally enter rm *.* at the UNIX
prompt only to realize too late that they have removed the wrong
segment of the directory structure." - Microsoft WSS whitepaper
From: Noons on
David Nebenzahl wrote,on my timestamp of 31/10/2009 5:49 AM:
> On 10/30/2009 8:17 AM Thor Lancelot Simon spake thus:
>
>> I wonder whether, at this late date, it would be possible to persuade
>> Kodak to divulge the formula for Technidol.
>
> Sorry, wrong newsgroup; that should be Richard *K*. (M is a guru from
> another NG.)

Anyone in APUG would possibly know?
I'm still finding Technidol in a number of local shops. Stashing it away in
large quantities at the mo: used with Adox CMS20, I get stunning results.
Adox makes their own developer for their film but Technidol works brilliantly as
well.
From: Murray on
Nicholas O. Lindan wrote:
> "Thor Lancelot Simon" <tls(a)panix.com> wrote
>
>> I wonder whether, at this late date, it would be possible to persuade
>> Kodak to divulge the formula for Technidol.
>
> That would be lovely.
>
> Whatever it is, it isn't POTA, more like H&W Control. The ingredients:
>
> 1) Diethylene Glycol:
> diluent
>
> 2) Hydroquinone:
> developing agent
>
> 3) Diethanolamine sulfur dioxide complex:
> alkali/activator?
> Carbonate substitute? Kodak loves the stuff.
>
> 4) Tris (1-methylethyl) naphthalene sulfonic acid sodium salt:
> wetting agent/developing agent(?)
>
> 5) 1-Phenyl-4, 4-dimethyl-3-pyrazolidinone:
> AKA Dimezone, phenidone-like developing agent
>
> I am taking a guess at the reasons for the DEA-SO2 and naptha-sulfonic salt.
> Anyone with any more clues?
For the sake of record I measured the pH of Technidol before
I poured it into the tank - it was 8.8. This surprised me as
plain DEA has a pH higher than TEA. The SO2 may pull it down.
The colour of the spent developer even after 7 mins was brown and I
expected it to be pinkish if penidone (Dimezone) was the
main agent. Didn't know about the HQ altho it could be a
substitute for catechol which IIRC was thought to be in
Technidol originally. I have no data on that.
How active is HQ at pH 8.8?
Getting to be like alchemy.
Murray